시뮬레이션을 이용한 군용 직렬형 HEV의 주행 전략에 따른 연비 성능 비교에 관한 연구

정대봉(Daebong Jung),김형준(Hyungjun Kim),강형묵(Hyungmook Kang),박재만(Jaeman Park),민경덕(Kyoungdoug Min),서정일(Jung-il Seo) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.6

군용 차량은 일반 차량에 비하여 높은 기동 성능 및 정숙성을 요구한다. 또한 최소의 연료보급으로 최대의 작전 수행 능력을 보유하고 있어야 한다. 시리즈 하이브리드 자동차의 경우 모터만을 이용하여 차량을 구동하므로, 정숙성이 뛰어나고 초기 기동 토크가 커 구동 성능이 뛰어나다. 또한 하이브리드화를 통하여 연비 향상 효과를 얻을 수 있다. 이와 같은 시리즈 하이브리드 차량의 경우 배터리 SOC 와 차량의 주행 상태에 따라 엔진과 발전기로 이루어진 발전 시스템에서 전기를 생산하여 차량 구동에 이용하거나 배터리를 충전한다. 발전 시스템의 작동 여부와 작동 영역을 결정하는 것이 시리즈 하이브리드 차량의 주행 전략이며 이 주행전략에 따라 연비 성능에 차이가 난다. 본 연구에서는 다양한 주행 전략을 비교/평가함으로써 군용 시리즈 하이브리드 차량의 연비 성능을 최대로 높일 수 있는 주행 전략을 제안하였다. The military vehicle, compared to a conventional vehicle requires higher driving performance, quietness and longer driving distance with minimal fuel supply. The series hybrid electric vehicle can be driven with no noise and has high initial startup performance because it uses only traction motor which has high startup torque to drive the vehicle Moreover, the fuel economy can be improved as vehicle is hybridized. In series hybrid electric vehicle, the electric generation system which consists of engine and generator supplies electric energy to battery or traction motor as vehicle driving states and battery SOC. The control strategy determines the operation of generation system. Thus, the fuel economy of the series hybrid electric vehicle is changed depending on which control strategy is applied to vehicle. In this study, the control strategy which shows the best fuel economy is suggested by comparing 3 control strategies.

Mechanical Optimization of Series Hybrid Electric Vehicle with Plant Oil Electric generator

Yoshihiko Takahashi,Ryo Matsumoto,Hirotake Sasai 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10

We propose a new hybrid electric vehicle which uses natural energy, consumes little fuel, and operates over a long distance. We are designing a series hybrid system, in which a diesel engine operating on plant oil rotates an electric generator, and runs the vehicle using the generated electricity. The generated electricity may also be stored in batteries, which are also able to power the electric vehicle. The general intention of the proposed system is to reduce the use of non-renewable fossil fuels, and to reduce overall costs. Plant oil is ecological, and allows for the creation of a carbon neutral system in its production. Some forms of plant oils, such as non-esterified straight vegetable oil (NE-SVO) and waste vegetable oil (NE-WVO), are promising alternatives used in order to reduce fuel costs. In this paper, we will explain the concept of the proposed series hybrid electric vehicle system using plant oil, and will provide some experimental results of mechanical optimization in the electric generation system and the vehicle drive system. Considering fuel efficiency and the drive torque, optimum reduction ratios were obtained in the experimental results.

Bio Fuel Injection and Generated Voltage Change of Series Hybrid Electric Vehicle with Plant Oil Electric Generator

Ayumi Sudo,Yoshihiko Takahashi 제어로봇시스템학회 2016 제어로봇시스템학회 국제학술대회 논문집 Vol.2016 No.10

We are developing a range extended electric vehicle using a diesel engine electric generator with plant (vegetable) oil (named as bio EV). The vehicle design concept is a series hybrid electric vehicle. A diesel engine rotates a DC motor by using plant oil to generate electricity, and the developed vehicle runs by using the generated electricity. It is possible to run a long distance without refueling, and plant oil fuels are sustainable natural resources. Generally, a fuel mixture consisting of light oil and plant oil is used as bio fuel. However, in this study, we only used plant oil (SVO: straight vegetable oil or WVO: waste vegetable oil) as bio fuel in order to reduce fuel cost, and avoid using fossil fuel. As the viscosity of SVO or WVO is higher than that of general light oil, it is essential to examine the phenomena of fuel injection and generated voltage change. This paper reports the examination results of the bio fuel injection phenomena and the generated voltage change phenomena.

Study on the Heat Recovery System in Series Hybrid Electric Vehicle

정대봉(Jung, Daebong),용진우(Yong, Jinwoo),김민재(Kim, Minjae),김형준(Kim, Hyoungjun),민경덕(Min, Kyoungdoug) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11

In recent, there are tremendous requirements to improve the fuel economy of vehicle. For satisfaction of requirements, Hybrid Electric Vehicle or other technologies are suggested and implemented. However, it should be noted that almost 35% energy loss is occurred in the shape of exhaust gas as ever. For increase the efficiency of vehicle, it is certain that the exhaust gas energy should be recover, and generate energy. In previous studies, the technologies such as turbo-compound, thermoelectric and rankine cycle are suggested to recover the exhaust heat energy in vehicle. But, they focus on the conventional vehicle or parallel Hybrid Electric Vehicle. Series Hybrid Electric Vehicle has advantage that the engine and drive shaft are de-coupled. It means that the engine can be operated in high efficiency area regardless with vehicle states. Therefore, if rankine cycle is applied to series hybrid electric vehicle, operating condition of that becomes almost steady. So, in this study, theoretical analysis on the efficiency of rankine cycle applied to series hybrid electric city bus is carried and the energy recovered from exhaust gas during vehicle drive cycle is calculated.

직렬형 하이브리드 구동계 운송수단 개발을 위한 등가소비전략 연구

홍석진(Seokjin Hong),윤석호(Seokho Yun),최웅철(Woongchul Choi) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11

Tourists who visited Thailand in November 2018 increased 23.2% year-on-year and can expect a surge in the use of two-wheeled vehicles, Thailand’s main means of transportation. As a result, air pollution in Thailand is serious and the Thai government has announced that it will replace 22,000 electric two-wheeled vehicles by 2025. Although it is desirable to manufacture a two-wheeled vehicle in the structure of an electric two-wheeled vehicle that does not generate emissions, the northern region of Thailand has a chronic power shortage problem despite the high electricity supply rate. Therefore, it is realistic to manufacture a two-wheeled vehicle with some structural changes. The existing two-wheeled vehicle is driven by a gasoline engine, but the structure of the modified vehicle is a method of applying a series hybrid drive system and using a motor while driving the vehicle. The motor uses the electrical energy of the battery, and when the capacity of the battery is reduced below a certain level, the engine is operated and the generator starts to charge the battery. There is an advantage in that emissions can be reduced because the engine operates in certain situations. In this paper, the energy efficiency data of the two-wheeled vehicle and the restructured two-wheeled vehicle, which is the main transport in Thailand, were constructed using MATLAB Simulink. In addition, a block diagram was constructed to estimate the fuel and power consumption of the two-wheeled vehicle that had been restructured compared to the existing two-wheeled vehicle in an amount of money.

직렬형 하이브리드 차량의 동력 관리 전략 비교 연구

윤승재(Seungjae Yun),이경수(Kyongsu Yi) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10

Current research shows that applying hybrid system to vehicle is expected to successful improvement in fuel consumption and emission compared with conventional vehicle. This paper focuses on modeling and control strategies of heavy duty series hybrid electric vehicle to improve the fuel economy of the system. Vehicle model is developed based on the MATLAB Simulink and model validation is carried out by using the simulation results for representative driving modes. The power management strategies for series hybrid electric vehicle are developed in order to obtain reduced fuel consumption and maintain the battery SOC(State of Charge) within reasonable operating region. The global optimal solution has been found by using dynamic programming method. The rule-based controller and the ECMS(Equivalent fuel Consumption Minimization Strategy) controller have been developed and applied to the series hybrid electric vehicle.

Development of a power management strategy to minimize the fuel consumption of a heavy-duty series hybrid electric vehicle

윤성재,이강원,이경수 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.10

This paper presents a power management strategy to minimize the fuel consumption of a heavy-duty series hybrid electric vehicle. Thevehicle model, which consists of a CNG engine, a generator, two driving motors and a battery, is developed and validated with experimentaldata. Dynamic programming (DP) is applied to design a control algorithm optimizing fuel consumption of the series hybrid electricvehicle. By imitating the behavior of the DP control signal, a rule-based control algorithm is proposed. The controller actuates theCNG engine, generator, and battery to minimize fuel consumption and maintain the battery state of charge within a proper region. Simulationstudies and experiments are conducted for typical driving modes to investigate the performance of the proposed power managementstrategy. Results indicate that fuel economy can be enhanced by approximately 30% using the proposed power management strategyto the series hybrid electric vehicle over the conventional vehicle.

직렬형 하이브리드 차량의 장거리 주행 연비 향상을 위한 순항 파워제어 알고리즘 및 실차 검증

정순규(Soonkyu Jeong),이상욱(Sangwook Lee),한규홍(Kyuhong Han),이윤복(Yoonbok Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11

Research on the series hybrid electric propulsion system in the field of military vehicles has been carried out because it has advantages such as high electric power exportability to mission equipment, low noise driving capability, as well as fuel economy. The series hybrid electric vehicles can increase fuel economy by operating engine/generator at its optimal operating point but it can cause excessive charge and discharge current to/from the high voltage battery and then heat problem, efficiency decrease, and life reduction. To solve this problems, by operating engine/generator at its optimal operating point at low vehicle speed, and by controlling engine/generator power to the sum of the driver"s power request and the vehicle"s board net power consumption, current to/from battery could be reduced and the vehicle"s efficiency increased. This paper provides the cruising power control algorithm and its real-vehicle test results which minimizes charge and discharge battery current at high vehicle speed and then reduces heat problems and increases efficiency.

시뮬레이션을 이용한 군용 직렬형 HEV 의 주행 전략에 따른 연비 성능 비교에 관한 연구

정대봉(Daebong Jung),김형준(Hyungjun Kim),강형묵(Hyungmook Kang),박재만(Jaeman Park),민경덕(Kyoungdoug Min),서정일(Jung-il Seo) 대한기계학회 2012 大韓機械學會論文集B Vol.36 No.1

군용 차량은 일반 차량에 비하여 높은 기동 성능 및 정숙성을 요구한다. 또한 최소의 연료 보급으로 최대의 작전 수행 능력을 보유하고 있어야 한다. 시리즈 하이브리드 자동차의 경우 모터만을 이용하여 차량을 구동하므로, 정숙성이 뛰어나고 초기 기동 토크가 커 구동 성능이 뛰어나다. 또한 하이브리드화를 통하여 연비 향상 효과를 얻을 수 있다. 이와 같은 시리즈 하이브리드 차량의 경우 배터리 SOC 와 차량의 주행 상태에 따라 엔진과 발전기로 이루어진 발전 시스템에서 전기를 생산하여 차량 구동에 이용하거나 배터리를 충전한다. 발전 시스템의 작동 여부와 작동 영역을 결정하는 것이 시리즈 하이브리드 차량의 주행 전략이며 이 주행전략에 따라 연비 성능에 차이가 난다. 본 연구에서는 Thermostat, Power-Follower, Combined 주행 전략을 비교/평가 하였으며 새롭게 제안한 Combined 주행 전략을 통하여 기존 차량 대비 37%의 연비 향상 효과를 얻을 수 있었다. Military vehicles, compared to conventional vehicles, require higher driving performance, quieter operation, and longer driving distances with minimal fuel supplies. The series hybrid electric vehicle can be driven with no noise and has high initial startup performance, because it uses only a traction motor that has a high startup torque to drive the vehicle. Moreover, the fuel economy can be improved if the vehicle is hybridized. In series hybrid electric vehicles, the electric generation system, which consists of an engine and a generator, supplies electric energy to a battery or traction motor depending on the vehicle driving state and battery state of charge (SOC). The control strategy determines the operation of the generation system. Thus, the fuel economy of the series hybrid electric vehicle relies on the control strategy. In this study, thermostat, power-follower, and combined strategies were compared, and a 37% improvement in the fuel economy was implemented using the combined control strategy sug gested in this study.

최적 연비 성능을 위한 시리즈 하이브리드 차량의 통합 제어기 개발

윤승재(Seung Jae Yun),최재웅(Jae Woong Choi),이경수(Kyong Su Yi) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5

본 논문에서는 시리즈 하이브리드 차량의 동력 제어기와 주행 제어기를 연구하였다. 기존차량대비 연료저감효과를 평가하기 위하여 시리즈 하이브리드 차량 모델을 개발하였다. 주행제어기는 구동모터 제어기와 회생제동 제어기로 구성되어있으며 구동모터 제어기는 운전자의 페달 조작량으로부터 차량의 요구토크를 계산, 구동모터를 제어하고 회생제동 제어기는 회생제동량을 최대화하기 위하여 제동토크를 각 바퀴에 분배한다. 동력관리 제어기는 운전점 제어기와 엔진출력 제어기로 이루어져 있으며 최적 운전점과 엔진출력은 최적해로부터 얻은 규칙기반 제어기에서 결정된다 제안된 제어기의 성능은 대표 주행 모드를 주행할 때의 연료 효율과 종방향 성능의 시뮬레이션 결과를 이용하여 검증하였다. This paper presents power management controller and driving controller for a series hybrid electric vehicle. To evaluate reduction of fuel consumption compared with conventional vehicle, series hybrid electric vehicle model is developed. Driving controller contains driving motor controller and regenerative braking controller, driving motor controller calculates required power of driving motor by using pedal displacement of driver and regenerative braking controller distributes braking torque to maximize regeneration. Power management controller is composed of engine operating point controller and engine power controller. Operating point and power produced by engine is determined by rule-based controller which is based on optimal solution. Performance of proposed controller has been investigated via simulation of fuel economy and longitudinal performance for alternative representative driving modes.